private bool ValidateExpression()
{
try
{
//preverimo z -1 in 1
Mathematics.MathParser _mathParser;
_mathParser = new Mathematics.MathParser(new KeyValuePair <string, double>("x", -1));
_mathParser.Compute(this.customComboBox_Expression.Text);
_mathParser = new Mathematics.MathParser(new KeyValuePair <string, double>("x", 1));
_mathParser.Compute(this.customComboBox_Expression.Text);
this.customComboBox_Expression.BackColor = Defaults.LightGreenColor;
return(true);
}
catch (Exception _exception)
{
this.customComboBox_Expression.BackColor = Defaults.LightRedColor;
Utility.Exception(
this,
this.Text,
_exception);
return(false);
}
}
private void Form_AddAFunctionReference_Load(object sender, EventArgs e)
{
#region "zložimo vse suportane tokene v report"
Mathematics.MathParser _mathParser = new Mathematics.MathParser();
List <ReportItem> _reportItems = new List <ReportItem>();
KeyValuePair <string, string>[] _operators = _mathParser.GetSupportedOperators();
foreach (KeyValuePair <string, string> _keyValuePair in _operators)
{
ReportItem _reportItem = new ReportItem(
_keyValuePair.Key,
_keyValuePair.Value,
"Operators");
_reportItems.Add(_reportItem);
}
KeyValuePair <string, string>[] _functions = _mathParser.GetSupportedFunctions();
foreach (KeyValuePair <string, string> _keyValuePair in _functions)
{
ReportItem _reportItem = new ReportItem(
_keyValuePair.Key,
_keyValuePair.Value,
"Functions");
_reportItems.Add(_reportItem);
}
KeyValuePair <string, string>[] _constants = _mathParser.GetSupportedConstants();
foreach (KeyValuePair <string, string> _keyValuePair in _constants)
{
ReportItem _reportItem = new ReportItem(
_keyValuePair.Key,
_keyValuePair.Value,
"Constants");
_reportItems.Add(_reportItem);
}
ReportItem _reportItemX = new ReportItem(
"x",
"The X in the function",
"Constants");
_reportItems.Add(_reportItemX);
this.report1.ReportItems = _reportItems.ToArray();
#endregion "zložimo vse suportane tokene v report"
this.customComboBox_Expression.Items.Clear();
this.customComboBox_Expression.Items.AddRange(FunctionInfoReference.PreviousExpressions);
}
public static void Start()
{
string _expression = "2 log(3)";
try
{
Mathematics.MathParser _mathParser = new Mathematics.MathParser();
double _output = _mathParser.Compute(_expression);
}
catch (Exception _ex)
{
}
}